Tech Today

Quality-assurance guidelines

Proper quality assurance during roof system installation can be an important element
for long-term performance.

Quality assuranceunlike quality control, which is performed by roofing contractorsis
the responsibility of a building owner or his or her designated representative,
such as a licensed design professional, roof consultant or general contractor. The
purpose of quality assurance is to verify the scope and intent of a project's contract
documents are being met and roof system materials are being installed in accordance
with contract documents, manufacturers' installation instructions and accepted industry
practices.

NRCA asserts the most effective means of providing quality assurance is by visually
observing materials and procedures used at the time of roof system installation.
The person performing visual observation often is referred to as a quality-assurance
observer (QAO).

ASTM D7186

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